Bagley Lake Water Temperature
Bagley Lake in Clearwater County, Minnesota typically sits around 61°F at the surface in September — warmest in Jul (~65°F) and coldest in May (~54°F). That is a typical value for the month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 343 field readings (2011–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Bagley Lake warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Bagley Lake scored A on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Minnesota lakes
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Where to stay near Bagley Lake
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Frequently asked questions
What is the water temperature of Bagley Lake?
Bagley Lake typically sits around 61°F at the surface in September, from 343 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
When is Bagley Lake warmest?
Surface water at Bagley Lake is typically warmest in July, reaching about 65°F. Lake surface temperature lags air temperature by several weeks, so the warmest water usually arrives in mid-to-late summer even though the hottest air can come earlier.
Is Bagley Lake warm enough to swim?
At its typical summer peak of about 63°F, Bagley Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Bagley Lake water temperature data come from?
Every temperature on this page is a typical (climatological) value computed from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal — 343 readings from 1 monitoring station between 2011 and 2025. They describe what is typical for each month, not the temperature right now.
About this data
Water temperatures are a climatology — the typical value for each month, averaged from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal. They tell you what to expect, not the temperature at this moment. Actual conditions vary with recent weather, depth, and time of day.